Underground electric conduit



2 Sheets-Sheet 1.

(No Model.)

H. H. YOUNG. UNDERGROUND ELECTRIC GONDUIT.

Patented Deo. 9,1890.

(No Model.) 2 Sheets-Sheet 2. H. H. YOUNG. UNDERGROUND ELECTRIC GONDUIT.

Patented Deo. 9, 1890.

Ay/1J..

tl'NdITED STATES PATENT OFFICE.

IIOMER II. YOUNG, OF KANSAS CITY, MISSOURI.

UNDERGROUND ELECTRIC CONDUIT.

SPECIFICATION forming part of Letters Patent N0. 442,162, dated December 9, 1890.

Application tiled J une Z3, l 3 90.

To all whom it may concern:

Be it known that I, HOMER II. YOUNG, a citizen of the United States, and a resident of Kansas City, in the county of Jackson and State of Missouri, have invented a new and useful Improvement in Conduits, of which the following is a clear, full, and exact speciication.

My invention relates to underground conduits, particularly such as are designed for electric conductors, and has for its object to provide a cheap and simple conduit. It is illustrated in the accompanying drawings, wherein- Figure lv is a perspective view of a portion of the conduit; Fig. 2, a longitudinal section with the conductors removed; Fig. 3, a crosssection of the same; Fig. et, a cross-section showing the wires embedded in a compound. Fig. 5 is a detail of an additional supporting device for the wires. Fig. 6 is a perspective view of two abutting portions of the conduit. Fig. 7 is a longitudinal section of the same, with the covers also shown; and Fig. S is a cross-section through the latter when in position.

Like parts are indicated by the same letter in all the figures.

A is the pavement or street, and B the soil beneath, in which lies the conduit. This is composed of the outer sections C C, having each at one end the shoulderD to receive the other in the usual manner to make a joint. These parts D and C are U-shaped in cross-section, as shown, and covered by the lidsE E, which are grooved at F to receive the upper portion of the conduit proper, and are provided each at one end with the shoulder G. Iithin this conduit is a similar smaller conduit, similar parts lettered in like manner as follows: The inner conduit is composed of the outer sections C C', having each at one end the shoulder D to receive the other in the usual manner to make a joint. These parts D and C are U-shaped in cross-section, as shown, and covered bythe lids E E', which are grooved at F to receive the upper portion of the conduit proper, and are provided each at one end with the shoulder G. The inner .nd outer conduits are so laid as to break the joints, as indicated in Fig. 2, and there may bc disposed between them a water-proof pack- Serial No. 356,334:- (No model.)

ing material (l2-for example, asphalt. WVithin the inner conduit are placed the conductors H H, and they may be supported upon the perforated plate J or the serrated plates K. This compound may be made in part or wholly of any good non-conducting substance, or it' the wires be coated with insulation the compound L may be composed of some moistureproof substance.

The use and operation of my invention are as follows: The ditch having been dug, the outer conduit is laid and the inner conduit placed therein on a suitable packing or support. The conductors are now laid Within the inner conduit, being suitably 'supported therein by the plates J or K, or, if desired, the inner conduit may be lled with the insulating compound L. The lid E is now placed in position upon the inner conduit C. It is of course understood that all overlapping joints will be properly cemented and set together and covered so as to make close joints. The packing is now placed over the lid E', and the lid E is placed in position and the ditch is then iilled. Ot course this work would proceed in sections, the conductors being suitably supported as they are laid in position. The plates .I and K may be of insulating material, if desired, or the wiresr themselves may be thoroughly coated with insulation. The conduits are made of suitable material--aa for instance, of vitritied tiling or the like. The joints at the sections of the inner and outer conduit-pipes should be securely made water-tight. by asphalt or the like, so that the whole will present two conduits, one within the other without, and both water-tight or water-proof throughout.

The conductors in Fig. t are shown as embedded in a compoundfor example, asphalt. They should be insulated individually.

The shoulder G receives the plain end of the contiguous section of the conduit and the side shoulder is slightly depressed below the top of the two sections, which come together on the same plane. The corresponding shoulder Gr on one end of each lid portion incloses the plain end, as indicated in Figs. 7 and 8.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is as follows:

IOO

il. A conduit for underground conductors, mnsisting of an outer conduit'I composed of io ted sections, an inner conduit ot' similar swieture, but whose joints do not lie in the seme transverse plane as the joints of the outerconduit,pz\cking interposed between the two suspendingqiilates within the inner conduit for the conductors, insulating' material surrounding each, and a compound surrounding all such conductors, and lids upon the sections of such conduits grooved to receive the upper edges of the lower portion of the conduit, substantially as shown and described.

2. A conduit for underground conductors, consisting of U-shaped sections having covers grooved 011 theirlowersid es to receive the upper edges of the U-sheped portions, und shoulders upon the ends of the sections and covers, whereby overlapping joints are made.

3. A conduit for underground conductors, consist-ing of U-shziped sections having covers grooved on their lower sides to receive the upper edges of the U-shztpcd portions,'zu1d shoulders upon the ends of the sections and covers, whereby overlapping joints are made and zi similar inner conduit.

4. A conduit for underground conductors, consisting of U-shuped sections having covers grooved on their lower sides to receive the upper edges ol' the U-shnped portions, and shoulders upon the ends of the sections und covers, whereby overlapping joints ure made and n similar inner conduit, und packing interposed between the inner and outer conduits.

5. As a conduit for underground conductors, si vitriied tiling conduit consisting of U shaped sections, with shouldered and grooved lids therefor, substantially :is shown.

'IIOMER II. YO'VNG.

Ti'itnesses:

CELEs'rE l. CHAPMAN, DAViDA J. JoHNsoN. 

